Stuffing-box and packing therefor



May 17, 1932. .1. R. COLE STUFFING BOX AND PACKING THEREFOR Filed April16, 1930 INVENTOR Patented May 17, 1932 UNITED STATES;

31mins nfloonn, or TULSA counrr, okmmom 1 swarms-Box annrxcxme rnnanronApplication filed April 18, 1980. Serial No. 444,597.

My invention relates to stufling boxes, primarily for oil wells butcapable of using in other connections, and has for its object to providea box which can be very easily opened I. to replace the rubbers orpacking material, and very easily closed, and one which permits all ofthe rubber or packing material to be used. The convenience mentioned isparticularly beneficial on oil wells where many times I a wrench to openand close a box in order to replace rubbers, is not handy. My inventionalso relates to providing means of satisfactorily packing such a box' inthe manner stated, that is in providing a packing element in a form sothat it may all be used up in the-box.

With the above and other objects in view which will appear as lhedescription proceeds, my invention consists in the novel featureshereinafter set forth in detail, illustrated in the accompanyingdrawings, and more particularly pointed out in the appended claims. I I

Referring to the drawings, in which numerals of like character designatesimilar parts thruout the several views: Y

Fig. 1 is a cross sectional view in side elevation, on li ne .AA Fig. 2,of the polished rod'and box with the rubbers or packing ,in place.

Fig. 2 is a cross sectional view in end elevation, on line BB Fig. 1, ofthe lished rodandstufling box frame, showing t e packing chamber. 1

Fig. 3 is a cross sectional view in top elevation, on line C-C Figs. 1and 2.

Fig. 4 is a view of a rubber or packing elengeint having a groove totake the polished r Fig. 5 is a view of a rubber without the groove anddesignedto use following the ruber shown in Fig. 4.

Fig. 6 is a rubber in modified form having the polished rod groove andalso. having the opposite end to the polished rodgroove of the contourof said grt ve so as to dovetail into it when following arubber into the:box.

Fig. 7 is a follower in modified form with its face made to conform tothe rear nd of' the modified form of rubber shown in ig. 6.

I an Fig. 8 is. a cross sectional side elevation of a modified form oflocking arrangement for the thrust plate or removablev breech block. 11of Fig. 1.

Fig. 9 is an end view shown in Fig. 1.

In the drawings, 1 represents the polished rod or other reciprocatingelement, 2 the stufling box frame or body portion which is threaded asat 3 toattach to the tubing or 6.0 pipe or chamber containin the fluidwhich it is desired to pack off, 4 t e packing chamber which togetherwith its passage way which is a continuation of the chamber, runs clear.thru the box from one end to the other and open on both ends, 5 therubbers or packing elements which are inserted in the open end of thepacking chamber 4 thru the passage way aforesaid, 6 the straight sidedreplacement rubbers designdd to follow the rubber 5 as the latter wears,7 a modified typej of rubber or packing element designed so of thestufling box 55 that one may follow the other into the box and this typewould replace-both rubbers 5 and 6, 8 the follower which contacts withthe rubber and forces it into place against the polished rod by means ofa screw 10 threaded into athrust plate or removable breech block 11 heldon the end of the stuffing boxby a locking groove 12 on the box, and bya 5 latch 13 on the box. The arrangement per- 7 mits the thrust plate tobe inserted into thegroove 12 and then positioned against the end of thebox, and the latch, which is pivoted i so that it may be turned, is thenbrought over the thrust plate. The follower 8, when pulled back close tothe thrust plate will clear the chamber or passage way wall's. When thefollower is screwed against the rubber 5, the thrust plate bears againstthe shoulder or flange of the groove 12 and 1 against the latch 13. v 1

n Fig. 8 is shown another lockin device locking the, thrust plate 1Lvagalnst the ends of the stuffing box chamber, and in this, form thelatch is dispensed with and opposite the groove which corresponds togroove 12 in Fig. 1 is a deeper groove or recess 14 ending in'a shoulder15. In using this form,- f the follower is screwed back ,against thethrustplate or nearly so, and the thrust plate then inserted in groove14 which is large enough to hold the lip of the thrust plate thusinserted therein and deep enough to then permit the other end oropposite lip of the thrust plate to be inserted in the groovecorresponding to the groove '12 in Fig. 1, whereupon the end of thethrust plate in groove l fisbrou ht back to the shoulder 15. When the 0lower is screwed up against the rubber or packing element preceding itinto the packing chamber, the pressure holds the thrust plate againstthe shoulder or flange 15- of the recess 14 and against the shoulder orflange 16 of the recess corresponding to the groove 12 in Fig. 1.

It will thus be seen that.no tools are necessary to open the box andinsert the rubbers or packing element, and that when the packing elementwears no. part thereof is removed and thrown away but another element isinserted thru the breech of the packing chamber and its passage way andpressed into the packing chamber and compressed therein.

Having what I claim and desire to secure by Letters Patent is 1. Apacking element adapted for use in a stuffing box wherein a plurality ofpacking elements are used on opposite sides of a reciprocating elementpassed thru said stuffing box, front and rear surfaces on said packingelement, and with said front and rear surfaces correspondingly contouredto conform to each other to the effect that one of such packing elementsmay follow behind another of such packing elements into a stuffing box'and in its turn engage the reciprocating element aforesaid without anintervening space existing between the two packing elements such aswould leave the perimeter 6f the packing chamber of said stufiing boxexposed to the passage of fluid between the two aforesaid packingelements.

2. 5 A stufling box adapted to receive a polished rod passed thru itspacking chamber, and having a packing chamber open at opposite sides ofthe. polished rod and with said .'said packing element against saidpolished rod opening arranged so that a packing element may be insertedtherethru on either side of polished rod; means of compressing said andagainst the walls of said packing chamber one of which means is a breechblock adapted to be held in position orrsaid stuffing box by thepressure exerted in compressing said packing element within saidstufling box.

3. A stuffing box as claimed in claim 2, with breech block as thereinclaimed, and

thus fully disclosed by invention,

ished rod passed thru its acking chamber and having a packing cham eropen at opposite sides of the polished rod and with said openingsarranged so that a packing element may be inserted'therethru on eitherside of said olished rod; means of compressing said packing elementagainst said polished rod and against the walls of said packing chamberone of which means is a breech block; and means provided whereby saidbreech block may be both positioned and held on said box and removedtherefrom without any operation other than by operating the said meansof compressing said packing element.

5. A packing element as claimed in claim 1. and with the front face ofsaid packing element having therein a groove adapted to partiallyreceive the polished rod aforesaid, and with the rear face of saidpacking element havin there!) a corresponding ridge. 6. A stu ng box a ated to receive a re ciprocating element passed thru its packing chamber;a packing chamber as aforesaid in said stuffing box and positionedlaterally of s the position assumed by said polished rod when passedthru said stuffing box; an opening in the end of said packing chamberadapted to receive a packing element passed thru said opening and intosaid packing chamber; a passageway communicating with said opening andleading tothe exterior of said stuffing box and so adapted and arrangedthat a packing element may be inserteththerethru into said packingchamber; a recess ,in said passageway adapted to receive a portionhereinafter mentioned removable breech block; means of compressing theaforesaid packing element against said reciprocating element when thesame is in said stufling box and of compressing said. packing elementagainst the walls of said packing chamber, one of which means is aremovable breech block adapted to be held in operatingposition on saidstuffing box by the pressure exerted in compressing said packing elementwithin said packing chamber.

In testimony whereof I affix my signature. JAMES R. COLE.

which said breech block is adapted to be released from said stufiing boxby removing the pressure on said packing element and by running back oneof the means of compressing sai packin element.

4. A stufling ox adapted to receive a polof the a

